Timing belt replacement, I lost timing marks

Tiny
VICTORY76
  • MEMBER
  • 2005 TOYOTA SIENNA
  • 300,000 MILES
Experienced mechanic messes up (me) removed old timing belt I saw marks aligned but old belt erased marks. I'm trying to install the new one starting from the crankshaft up to the cam #2 align mark to go to cam #1 align mark but the belt is not tight tensioner go up all the way belt still not tight proceeding from cam#2 to cam #1 after installing on crankshaft sprocket is one tooth after the mark. I got lost here. Can you please help me? What is the best way to make sure marks are correct as I remove the spark plug to check if the piston is up as I said before marks were all aligning but old belt has no marks.
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Wednesday, June 22nd, 2022 AT 4:59 AM

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Tiny
SEAN M
  • EXPERT
Hello,

There should be the top dead center marking on the pulleys, which can help you line up the belt.
Also, the belt needs to be installed in a specific sequence in order for it to go on properly.

I have attached the complete timing belt replacement procedure below. Take a look, it covers all the details and marking and sequences for the removal and installation.

Let me know of any questions.
Thank you.

https://www.2carpros.com/articles/how-a-timing-belt-works
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Wednesday, June 22nd, 2022 AT 12:08 PM

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